Description
SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the intended extraction root. For TAR archives, this can be escalated to arbitrary file writes by chaining with a symlink entry, giving a full write primitive on the target filesystem subject to the permissions of the running process.
Affected products
adamhathcock: sharpcompress
References2
- github.com/adamhathcock/sharpcompress/security/advisories/GHSA-… ExploitMitigationVendor Advisory
- github.com/adamhathcock/sharpcompress/security/advisories/GHSA-… ExploitMitigationVendor Advisory
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 25 · as of 14 November 2026
- CWE
- CWE-22
Could this be exploited in your environment?
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